Human and ape scurvy (and other genetic defects we share) are evidence of so-called macro evolution.
Is it any harder to believe in miracles than punctuated equalibrium?
Yes, it is for me. You see, there's nothing to 'believe in' with science, the way there is with the several revealed and traditional religions. We know science is just human thought trying to make sense of the world; our understanding changes with more knowledge and theory.
Since parts of the Bible (eg the worldwide flood) are known to be false, relying on it for natural history just seems silly to me.
Please elaborate.
You see, there's nothing to 'believe in' with science
Don't kid yourself friend. Read "The structure of scientific revolutions" by Kuhn.